Imported Blog Posts Not Showing

I'm rebuilding a client site using Studio and I've run into a problem I haven't been able to figure out.

I exported (using Tools>Export/Import) the old blog's content (roughly 275 posts and around 1000 comments) and imported it using the WP tools function.

On the new test site I set up a new page called Blog, added it to custom navigation and imported the old content. I used settings>reading to make the home page a new static page, and set blog posts to appear at the new blog page.

Unfortunately, when you go to the new /blog page, nothing shows up.

I can see all of the posts in Posts>All posts, but nothing we've tried shows posts at /blog.

Any suggestions/help greatly appreciated! if it's helpful.

Thanks -